Information processing system includes an operating unit and main element and reboot unit that reboots only operating unit in asynchronization with main element

ABSTRACT

An information processing system includes an operating unit that receives an input in response to a user operation and that runs under a first operating system; and a main body that runs under a second operating system and operates in response to the input received by the operating unit. The main body includes a generation unit that generates a command to direct rendering of a screen corresponding to an application being executed, and a command transmission control unit that provides control to transmit the command to the operating unit. The operating unit includes a receiving unit that receives the command from the main body, a screen rendering unit that renders the screen in accordance with the command received by the receiving unit, a display unit that displays the screen rendered by the screen rendering unit, and a reboot unit that reboots the operating unit in asynchronization with the main body.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to and incorporates by referencethe entire contents of Japanese Patent Application No. 2013-121286 filedin Japan on Jun. 7, 2013.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an information processing system, aninformation processing method, and a computer-readable storage medium.

2. Description of the Related Art

A configuration which implements an automatic reboot (restart) of adevice in the event of a failure of the device has been conventionallyknown (for example, Japanese Laid-open Patent Publication No.2004-152010 and Japanese Patent Application Laid-Open No. 2005-219247).

However, for example, there is a problem in association with theconventional technique in that the main device body is automaticallyrebooted even when an error (abnormality) which has no effect on acurrently running job occurs, with the result that the running job isnot assured.

Therefore, there is a need to provide an information processing system,an information processing method, and a computer-readable storage mediumwhich are capable of ensuring that a job is not affected by an errorthat has occurred.

SUMMARY OF THE INVENTION

It is an object of the present invention to at least partially solve theproblems in the conventional technology.

According to an embodiment, there is provided an information processingsystem that includes an operating unit that receives an input inresponse to a user operation, the operating unit running under a firstoperating system; and a main body that runs under a second operatingsystem and operates in response to the input received by the operatingunit. The main body includes a generation unit that generates a commandto direct rendering of a screen corresponding to an application beingexecuted, and a command transmission control unit that provides controlto transmit the command to the operating unit. The operating unitincludes a receiving unit that receives the command from the main body,a screen rendering unit that renders the screen in accordance with thecommand received by the receiving unit, a display unit that displays thescreen rendered by the screen rendering unit, and a reboot unit thatreboots only the operating unit in asynchronization with the main body.

According to another embodiment, there is provided an informationprocessing method to be executed by an operating unit that receives aninput in response to a user operation and is connected to a main body,the operating unit running under a first operating system, the main bodyrunning under a second operating system and operating in response to theinput. The information processing method includes receiving from themain body a command to direct rendering of a screen corresponding to anapplication being executed in the main body; rendering the screen inaccordance with the command received at the receiving; displaying thescreen rendered at the rendering; and rebooting only the operating unitin asynchronization with the main body.

According to still another embodiment, there is provided anon-transitory computer-readable storage medium with an executableprogram stored thereon and executed by a computer of an operating unitthat receives an input in response to a user operation and is connectedto a main body, the operating unit running under a first operatingsystem, the main body running under a second operating system andoperating in response to the input. The program instructs the computerto perform receiving from the main body a command to direct rendering ofa screen corresponding to an application being executed in the mainbody; rendering the screen in accordance with the command received atthe receiving; displaying the screen rendered at the rendering; andrebooting only the operating unit in asynchronization with the mainbody.

The above and other objects, features, advantages and technical andindustrial significance of this invention will be better understood byreading the following detailed description of presently preferredembodiments of the invention, when considered in connection with theaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram illustrating a hardware configuration example of anMFP;

FIG. 2 is a diagram illustrating a software configuration example of theMFP;

FIG. 3 is a diagram illustrating a functional configuration example ofthe main body;

FIG. 4 is a view illustrating a functional configuration example of anoperating unit;

FIG. 5 is a sequence diagram illustrating an example of an operationalprocedure of the MFP;

FIG. 6 is a diagram illustrating a functional configuration example of amain body according to a second embodiment;

FIG. 7 is a diagram illustrating an example of an interruption screen;and

FIG. 8 is a sequence diagram illustrating an example of an operationalprocedure of an MFP according to the second embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Exemplary embodiments of an information processing system according tothe present invention will be described in detail below with referenceto the accompanying drawings. Hereinbelow, an example in which aninformation processing system according to the present invention isapplied to a multifunction peripheral (MFP) will be described. However,the invention is not limited thereto. Note that the multifunctionperipheral has at least two functions of a print function, a copyfunction, a scanner function, and a facsimile function.

First Embodiment

FIG. 1 is a block diagram illustrating a hardware configuration exampleof an MFP 1 of the present embodiment. As illustrated in FIG. 1, the MFP1 includes a main body 10 which can implement various types of functionssuch as a copy function, a scanner function, a facsimile function, and aprinter function, and an operating unit 20 for receiving an input inresponse to a user operation. The main body 10 and the operating unit 20are connected so as to be capable of communicating with each otherthrough a dedicated communication channel 300. The communication channel300 to be employed can be, for example, of the Universal Serial Bus(USB) standard, but may also be of any standard, wired or wireless.

Note that the main body 10 can operate in response to an input receivedby the operating unit 20. Furthermore, the main body 10 can communicatewith an external device such as a client personal computer (PC) and thusalso operate in response to a command received from an external device.

A description will next be made to the hardware configuration of themain body 10. As illustrated in FIG. 1, the main body 10 includes a CPU11, a ROM 12, a RAM 13, a hard disk drive (HDD) 14, a communicationinterface (I/F) 15, a connection I/F 16, and an engine unit 17, whichare connected to each other through a system bus 18.

The CPU 11 provides centralized control to the operation of the mainbody 10. The CPU 11 executes programs stored, for example, in the ROM 12or the HDD 14 with the RAM 13 employed as a work area, and therebyprovides control to the operation of the entire main body 10 so as toimplement the aforementioned various types of functions such as a copyfunction, a scanner function, a facsimile function, and a printerfunction.

The communication I/F 15 is an interface for communicating with anexternal device such as the client personal computer (PC). Theconnection I/F 16 is an interface for communicating with the operatingunit 20 through the communication channel 300.

The engine unit 17 is a hardware component for performing processingother than general-purpose information processing and communications inorder to implement a copy function, a scanner function, a facsimilefunction, and a printer function. For example, the engine unit 17includes a scanner (an image reading unit) for scanning and reading animage of a document, a plotter (an image forming unit) for printing on asheet material such as a sheet of paper, and a facsimile unit forperforming facsimile communications. Furthermore, the engine unit 17 mayalso include a specific optional component such as a finisher forsorting printed sheet materials or an automatic document feeder (ADF)for automatically feeding documents.

A description will next be made to the hardware configuration of theoperating unit 20. As illustrated in FIG. 1, the operating unit 20includes a CPU 21, a ROM 22, a RAM 23, a flash memory 24, acommunication I/F 25, a connection I/F 26, an operation panel 27, and areset switch 28, which are connected to each other through a system bus29.

The CPU 21 provides centralized control to the operation of theoperating unit 20. The CPU 21 executes programs stored, for example, inthe ROM 22 or the flash memory 24 with the RAM 23 employed as a workarea, thereby providing control to the operation of the entire operatingunit 20 so as to implement various types of functions, to be discussedlater, such as the function of displaying information (images) inresponse to an input received from a user.

The communication I/F 25 is an interface for communicating with anexternal device such as a server through a network, for example, theInternet. The connection I/F 26 is an interface for communicating withthe main body 10 through the communication channel 300.

The operation panel 27 receives various types of inputs in response to auser operation and displays various types of pieces of information (forexample, information indicative of an operational status of the MFP 1 orinformation indicative of a setting status). In this example, theoperation panel 27 is a liquid crystal display device (LCD) having atouch panel function. However, the invention is not limited thereto. Forexample, the operation panel 27 may also be an organic EL display devicewhich incorporates a touch panel function. Furthermore, in addition toor in place of this, it is also possible to provide an operating unitsuch as a hardware key or a display unit such as a lamp.

The reset switch 28 is an operating device which is used to input acommand to execute a reboot (restart) of only the operating unit 20. Inthis example, when a user depresses the reset switch 28, a command toexecute a reboot of only the operating unit 20 is entered. However, suchan operating device is not limited to the reset switch 28.

A description will next be made to the software configuration of the MFP1. FIG. 2 is a schematic diagram illustrating an example of the softwareconfiguration of the MFP 1. As illustrated in FIG. 2, the main body 10has an application layer 101, a service layer 102, and an OS layer 103.The entities of the application layer 101, the service layer 102, andthe OS layer 103 are various types of software which are stored, forexample, in the ROM 12 or the HDD 14. The CPU 11 executes these piecesof software, thereby providing various types of functions.

The software of the application layer 101 is application software (whichmay also be referred to simply as an “application” hereinafter) foroperating hardware resources to provide a predetermined function. Forexample, the types of applications may include a copy application forproviding a copy function, a scanner application for providing a scannerfunction, a facsimile application for providing a facsimile function,and a printer application for providing a printer function.

The software of the service layer 102 is interposed between theapplication layer 101 and the OS layer 103 so as to provide an interfacefor using a hardware resource included in the main body 10. Morespecifically, the software provides functions for reception of a requestto operate a hardware resource and for arbitration of an operationrequest. It may be conceivable that the operation request received bythe service layer 102 is a request to read by a scanner or print by aplotter.

Note that the interface function by the service layer 102 is providednot only to the application layer 101 of the main body 10 but also to anapplication layer 201 of the operating unit 20. That is, the applicationlayer 201 (application) of the operating unit 20 can implement afunction using a hardware resource (for example, the engine unit 17) ofthe main body 10 through the interface function of the service layer102.

The software of the OS layer 103 is the basic software (operatingsystem) that provides a basic function for controlling the hardwareincluded in the main body 10. The software of the service layer 102converts a request to use a hardware resource from various types ofapplications to a command that can be interpreted by the OS layer 103,and then passes the command to the OS layer 103. Then, the software ofthe OS layer 103 executes the command, thereby allowing the hardwareresource to operate in accordance with the request of the application.

Likewise, the operating unit 20 has the application layer 201, a servicelayer 202, and an OS layer 203. The application layer 201, the servicelayer 202, and the OS layer 203 included in the operating unit 20 alsohave the same hierarchical structure as that of the main body 10.However, the function provided by the application of the applicationlayer 201 and the type of the operation request that can be received bythe service layer 202 are different from those of the main body 10.Applications of the application layer 201 may be such pieces of softwarethat operate the hardware resources included in the operating unit 20 soas to provide a predetermined function, but may mainly include pieces ofsoftware for providing a user interface (UI) function of operating ordisplaying the functions (a copy function, a scanner function, afacsimile function, and a printer function) included in the main body10.

Note that in the present embodiment, to ensure the independency of thefunctions, the software of the OS layer 103 of the main body 10 and thesoftware of the OS layer 203 of the operating unit 20 are different fromeach other. That is, the main body 10 and the operating unit 20 operateon different operating systems independently of each other. For example,it is also possible to employ Linux (registered trademark) as thesoftware of the OS layer 103 of the main body 10 and Android (registeredtrademark) as the software of the OS layer 203 of the operating unit 20.

Furthermore, in the present embodiment, since power is supplied to theoperating unit 20 through the communication channel 300 from the mainbody 10, control on the power supply of the operating unit 20 can beprovided separately from (independently of) the control on the powersupply of the main body 10.

A description will next be made to the functional configuration of theMFP 1. FIG. 3 is a diagram illustrating a functional configurationexample of the main body 10, and FIG. 4 is a diagram illustrating afunctional configuration example of the operating unit 20. Forconvenience of description, FIGS. 3 and 4 mainly illustrate thefunctions according to the present invention. However, the functions ofthe MFP 1 are not limited thereto.

First, a description will be made to the function of the main body 10.As illustrated in FIG. 3, the main body 10 includes a communication unit110, a generation unit 120, a command transmission control unit 130, afirst detection unit 140, and a rendering break unit 150.

The communication unit 110 communicates with the operating unit 20through the communication channel 300 mentioned above.

The generation unit 120 generates a rendering command for directing anapplication being executed to render a corresponding screen. Here, the“screen” refers to an image to be displayed on the operating unit 20(the operation panel 27). Screens corresponding to applications may takevarious forms depending on the type of the application or the runningstatus of the application. For example, when an application beingexecuted is a printer application, a screen corresponding to the printerapplication being executed may be formed to include an image fornotifying the current number of printed sheets.

The command transmission control unit 130 provides control to transmit arendering command to the operating unit 20. More specifically, when thegeneration unit 120 generates a rendering command, the commandtransmission control unit 130 provides control to allow thecommunication unit 110 to transmit the generated rendering command tothe operating unit 20.

The first detection unit 140 detects whether an abnormality has occurredin the communications with the operating unit 20. In the presentembodiment, the first detection unit 140 can detect a USB being detachedor a transmission control protocol (TCP) communication beingdisconnected.

When the first detection unit 140 has detected an abnormality, therendering break unit 150 provides control (which may also be referred toas the “rendering break control”) to reduce the rendering of a screen bythe operating unit 20. In the present embodiment, when the firstdetection unit 140 has detected an abnormality, the rendering break unit150 directs the generation unit 120 to stop generating the renderingcommand and as well directs the command transmission control unit 130 todiscard the rendering command. Note that in the present embodiment, evenwhen an abnormal communication event has occurred with the operatingunit 20 (even when the first detection unit 140 has detected anabnormality), an application being executed (for example, a printerapplication) on the side of the main body 10 continues to operatewithout changes made thereto.

Furthermore, in the present embodiment, when the abnormality detected bythe first detection unit 140 has been eliminated, the rendering breakunit 150 releases the break of rendering a screen by the operating unit20 (releases the rendering break control). More specifically, when thecommunication with the operating unit 20 has been recovered, therendering break unit 150 directs the generation unit 120 to restartgeneration of a rendering command and as well directs the commandtransmission control unit 130 to restart transmission of a renderingcommand. Upon reception of the direction, the generation unit 120generates the rendering command for directing the rendering of a screendepending on the current status of an application being executed, whilethe command transmission control unit 130 provides control so as totransmit the rendering command generated by the generation unit 120 tothe operating unit 20.

For example, suppose that the application being executed on the side ofthe main body 10 is a printer application and the screen correspondingto the printer application being executed includes an image fornotifying the current number of printed sheets. For example, when thefirst detection unit 140 detects an abnormality at the current number ofprinted sheets of “20”, the printer application being executed continuesoperating without changes made thereto. However, the aforementionedrendering break control causes the generation of the screencorresponding to the printer application being executed to be stopped,and the generated rendering command discarded. Subsequently, when theabnormality detected by the first detection unit 140 is eliminated, therendering break unit 150 directs the generation unit 120 to restartgeneration of a rendering command. When the number of printed sheets is“50” at the point in time at which this direction was received, thegeneration unit 120 configured to generate a rendering command fordirecting, as a screen depending on the current status of the printerapplication being executed, rendering of a screen including an image tonotify that the current number of printed sheets is “50”.

The function of each of the communication unit 110, the generation unit120, the command transmission control unit 130, the first detection unit140, and the rendering break unit 150, which were described above, isimplemented by the CPU 11 executing programs stored in the ROM 12 or theHDD 14 with the RAM 13 employed as a work area; however, the inventionis not limited thereto. For example, at least part of the functions ofthe aforementioned respective units of the main body 10 may also beimplemented by a dedicated hardware circuit (for example, asemiconductor integrated circuit).

A description will now be made to the function of the operating unit 20.As illustrated in FIG. 4, the operating unit 20 includes a communicationunit 210, a screen rendering unit 220, a display unit 230, and a rebootunit 240.

The communication unit 210 communicates with the main body 10 throughthe aforementioned communication channel 300. For example, thecommunication unit 210 can also receive the rendering commandtransmitted from the main body 10. The communication unit 210 may bereferred to as a “receiving unit”.

The screen rendering unit 220 renders a screen in accordance with arendering command received from the main body 10. The display unit 230displays the screen rendered by the screen rendering unit 220. Morespecifically, the display unit 230 provides control so as to display thescreen rendered by the screen rendering unit 220 on the operation panel27.

The reboot unit 240 reboots only the operating unit 20 inasynchronization with the main body 10. In the present embodiment, whenhaving received an input to command execution of a reboot of only theoperating unit 20 in response to a user operation on the reset switch28, the reboot unit 240 reboots only the operating unit 20. Morespecifically, when the user depresses the reset switch 28, a command toexecute a reboot of only the operating unit 20 is entered. Then, uponreception of the input of the execution command, the reboot unit 240executes a reboot of only the operating unit 20.

The function of each of the communication unit 210, the screen renderingunit 220, the display unit 230, and the reboot unit 240, which weredescribed above, is implemented by the CPU 21 executing programs storedin the ROM 22 or the flash memory 24 with the RAM 23 employed as a workarea. However, the invention is not limited thereto. For example, atleast part of the functions of the aforementioned respective units ofthe operating unit 20 may also be implemented by a dedicated hardwarecircuit (for example, a semiconductor integrated circuit).

A description will now be made to an exemplary operation of the MFP 1according to the present embodiment. FIG. 5 is a sequence diagramillustrating an example of an operational procedure of the MFP 1according to the present embodiment. Note that the “renderingapplication” of the operating unit 20 illustrated in FIG. 5 can also beunderstood to correspond to the aforementioned screen rendering unit220. For convenience of description, in FIG. 5, the service layer 202 ofthe operating unit 20 or other applications are omitted and thus notillustrated.

First, when a user depresses a power switch (not illustrated), powerstarts to be supplied to the MFP 1 so as to start the OS layer 103 ofthe main body 10. The OS layer 103 that has been started outputs a startcommand to the service layer 102 (step S1). Furthermore, the OS layer103 that has been started outputs a start signal to the OS layer 203 ofthe operating unit 20 (step S2). Note that in this example, the OS layer203 of the operating unit 20 is started by receiving the start signalfrom the OS layer 103 of the main body 10. However, the invention is notlimited thereto. For example, the OS layer 203 of the operating unit 20may also be started when being supplied with the power that starts to besupplied by depressing the power switch.

The OS layer 203 of the operating unit 20 that has been started byreceiving the start signal from the main body 10 outputs a start commandto a rendering application (step S3). Next, a USB connection between theOS layer 103 of the main body 10 and the OS layer 203 of the operatingunit 20 is established (step S4). Upon detection of a USB connectionestablished, the OS layer 103 of the main body 10 notifies the servicelayer 102 of that event (step S5). The service layer 102 that hasreceived this notification requests the OS layer 103 to make a TCPconnection (step S6). Furthermore, upon detection of a USB connectionestablished, the OS layer 203 of the operating unit 20 notifies therendering application of this event (step S7). The rendering applicationthat has received this notification requests the OS layer 203 to make aTCP connection (step S8). Then, a TCP connection between the OS layer103 of the main body 10 and the OS layer 203 of the operating unit 20 isestablished (step S9).

When the rendering application that has been started by receiving thestart command in step S3 above is in an operable state, the renderingapplication notifies the OS layer 203 of being operable (step S10). Inthe following descriptions, that the rendering application is in anoperable state may also be referred to as “the operating unit beingready” and that the rendering application is in an inoperable state mayalso be referred to as “the operating unit being Not ready.” The OSlayer 203 that has received this notification notifies the OS layer 103on the main body 10 side of the operating unit being ready (step S11).Then, the OS layer 103 of the main body 10 notifies the applicationlayer 101 of the operating unit being ready (step S12).

The application layer 101 (the generation unit 120) that has receivedthe notification of the operating unit being ready generates theaforementioned rendering command. Then, the application layer 101 (thecommand transmission control unit 130) requests the OS layer 103 to makea notification of the rendering command (step S13). The OS layer 103that has received the request notifies the OS layer 203 on the operatingunit 20 side of the rendering command (step S14). The OS layer 203 ofthe operating unit 20 notifies the rendering application of therendering command transmitted from the main body 10 (step S15), and therendering application renders a screen in accordance with the renderingcommand of which the rendering application was notified (step S16).

Thereafter, in the example of FIG. 5, it is assumed that the operatingunit 20 will stall and the TCP communication or the USB communicationwill be disconnected due to an abnormal communication event or the like(step S17). When the USB communication or the TCP communication has beendisconnected, the OS layer 103 of the main body 10 (the first detectionunit 140) detects the USB being detached or the TCP communication beingdisconnected (step S18). Then, the OS layer 103 notifies the servicelayer 102 of the occurrence of an abnormality in the communications withthe operating unit 20 (step S19). The service layer 102 that hasreceived this notification notifies the application layer 101 of theoperating unit being Not ready (step S20).

The application layer 101 (the rendering break unit 150) that hasreceived the notification of the operating unit being Not ready providesthe aforementioned rendering break control (step S21). Morespecifically, as described above, the rendering break unit 150 directsthe generation unit 120 to stop generating the rendering command and aswell directs the command transmission control unit 130 to discard therendering command. On the other hand, since the screen displayed on theoperating unit 20 (the operation panel 27) is in a frozen state with thescreen being unchanged from immediately before the occurrence of theabnormality, the user glancing at this screen determines that someabnormality has occurred, and depresses the reset switch 28 (step S22).This action allows for entering a command to execute a reboot of onlythe operating unit 20, so that the reboot unit 240 that has received theinput of the command to execute the reboot executes a reboot of only theoperating unit 20.

Likewise the initial start, when the reboot of only the operating unit20 has been completed, a USB connection and a TCP connection between theOS layer 103 of the main body 10 and the OS layer 203 of the operatingunit 20 are established (step S23 to step S28).

Then, when the rendering application that has been restarted is in anoperable state, the rendering application notifies the OS layer 203 thatthe rendering application is operable (step S29). The OS layer 203 thathas received this notification notifies the OS layer 103 of the mainbody 10 of the operating unit being ready (step S30). Then, the OS layer103 of the main body 10 notifies the application layer 101 of theoperating unit being ready (step S31).

The application layer 101 (the rendering break unit 150) that hasreceived the notification of the operating unit being ready in step S31mentioned above releases the rendering break control (step S32). Morespecifically, as described above, the rendering break unit 150 directsthe generation unit 120 to restart generation of a rendering command andas well directs the command transmission control unit 130 to restarttransmission of a rendering command. The generation unit 120 that hasreceived this direction generates a rendering command for directingrendering of a screen depending on the current status of an applicationbeing executed. Then, the command transmission control unit 130 requeststhe OS layer 103 to make a notification of the rendering commandgenerated by the generation unit 120 (step S33). The OS layer 103 thathas received this request notifies the OS layer 203 on the operatingunit 20 side of the rendering command (step S34). The OS layer 203 ofthe operating unit 20 notifies the rendering application of therendering command transmitted from the main body 10 (step S35), and therendering application renders a screen in accordance with the renderingcommand of which the rendering application was notified (step S36). Therendering command that is notified at this time by the main body 10directs to render a screen depending on the current status of theapplication being executed. It is thus possible to present a screen as ascreen immediately after a reboot depending on the current status of theapplication being executed.

As described above, in the present embodiment, the operating unit 20 hasthe function (the reboot unit 240) for rebooting only the operating unit20 asynchronously to the main body 10. Thus, for example, when the TCPcommunication or the USB communication is disconnected due to a stall ofthe operating unit 20 or an abnormal communication event or the likewith the screen displayed on the operating unit 20 being in a frozenstate, the user depresses the reset switch 28 to execute a reboot ofonly the operating unit 20. That is, since the power supply of theentire MFP 1 needs not to be turned OFF and the main body 10 is notrebooted in synchronization with the operating unit 20, it is possibleto continue executing an application on the side of the main body 10that is not affected by the abnormal communication event with theoperating unit 20. That is, it is possible to ensure the job of theapplication on the side of the main body 10 that is not affected by theabnormality (error) that has occurred.

Furthermore, as described above, when an abnormality is detected in thecommunications with the operating unit 20, the rendering break unit 150of the main body 10 provides control (“the rendering break control”) soas to break rendering of a screen by the operating unit 20. Thus, whenthe abnormality in the communications with the operating unit 20 hasbeen eliminated, it is possible to positively prevent an unnecessaryrendering command from being notified to the operating unit 20.

Second Embodiment

A description will now be made to a second embodiment. In the followingdescription, a main body according to the second embodiment is denotedas the “main body 100”. The main body 100 according to the secondembodiment is different from that of the aforementioned first embodimentin that the main body 100 further includes an interruption processingunit for performing interruption processing to interrupt the operationof an application being executed when the first detection unit 140detects an abnormality. A description will next be made to specificcontents. Note that descriptions of the contents that are common tothose of the aforementioned first embodiment will be omitted asappropriate.

FIG. 6 is a diagram illustrating a functional configuration example ofthe main body 100. As illustrated in FIG. 6, the main body 100 furtherincludes an interruption processing unit 160 and a storage unit 170. Thestorage unit 170 associates pieces of feasibility information, which areindicative of whether the interruption processing should be executed,with the type of applications and stores therein the resultinginformation.

When the first detection unit 140 detects an abnormality, theinterruption processing unit 160 executes the interruption processing ifthe feasibility information corresponding to the application beingexecuted indicates that the interruption processing should be executed.On the other hand, if the feasibility information corresponding to theapplication being executed indicates that the interruption processingshould not be executed, the interruption processing unit 160 does notexecute the interruption processing. More specifically, when the firstdetection unit 140 detects an abnormality, the interruption processingunit 160 reads the feasibility information which corresponds to theapplication being executed among the plurality of pieces of feasibilityinformation stored in the storage unit 170. Then, the interruptionprocessing unit 160 executes the interruption processing when thefeasibility information that has been read indicates that theinterruption processing should be executed. On the other hand, when thefeasibility information having been read indicates that the interruptionprocessing should not be executed, the interruption processing unit 160does not execute the interruption processing.

Note that for example, it is also acceptable that the storage unit 170is eliminated. In this configuration, when the first detection unit 140detects an abnormality, the interruption processing unit 160unconditionally executes the interruption processing irrespective of thetype of the application being executed.

Furthermore, in the present embodiment, when the abnormality detected bythe first detection unit 140 has been eliminated while theaforementioned interruption processing is executed, the rendering breakunit 150 releases the screen break control, and the generation unit 120generates a rendering command for directing rendering of an interruptionscreen indicative of a screen which alarms that the operation of theapplication is under interruption. FIG. 7 is a view illustrating anexample of the interruption screen. In the example of FIG. 7, theinterruption screen includes an image for urging to select whether theoperation of the application under interruption should be continued orcancelled in addition to an image indicating that the operation of theapplication is under interruption. In this example, the user havingglanced at the interruption screen can select either that the operationof the application under interruption should be continued or cancelled.Upon reception of an input to select the continuation of the operationof the application under interruption, the main body 100 continues theoperation of the application under interruption. On the other hand, uponreception of an input to select the cancel of the application underinterruption, the main body 100 discards the execution of theapplication under interruption. Note that the form of the interruptionscreen is not limited to that of the example of FIG. 7. For example, theinterruption screen may be formed so as not to include the image forurging to select whether the operation of the application underinterruption should be continued or cancelled.

A description will next be made to an exemplary operation of an MFPaccording to the present embodiment. FIG. 8 is a sequence diagramillustrating an example of the operational procedure of the MFPaccording to the present embodiment. In FIG. 8, the illustration of theparts which relate to other than the aforementioned interruptionprocessing and which are commonly employed in the aforementioned firstembodiment is appropriately omitted. A description will be made mainlyto the parts relating to the interruption processing.

After the rendering break control in step S21 illustrated in FIG. 8(having the same contents as those of step S21 illustrated in FIG. 5),the application layer 101 (the interruption processing unit 160) readsthe feasibility information which corresponds to the application beingexecuted among a plurality of pieces of feasibility information storedin the storage unit 170, and then determines whether to execute theinterruption processing depending on the feasibility information thathas been read. It is assumed in the example of FIG. 8 that thefeasibility information corresponding to the application being executedindicates that the interruption processing should be executed, and thusthe application layer 101 (the interruption processing unit 160)executes the interruption processing (step S40). After that, the flowdown to step S32 (having the same contents as those of step S32illustrated in FIG. 5) is the same as that of the aforementioned firstembodiment.

In step S32 illustrated in FIG. 8, as in the aforementioned firstembodiment, the application layer 101 (the rendering break unit 150)releases the rendering break control. More specifically, as describedabove, the rendering break unit 150 directs the generation unit 120 torestart generation of a rendering command and as well directs thecommand transmission control unit 130 to restart transmission of arendering command. The generation unit 120 that has received thisdirection generates a rendering command to direct rendering of theinterruption screen. Then, the command transmission control unit 130requests the OS layer 103 to make a notification of the renderingcommand for directing the rendering of the interruption screen generatedby the generation unit 120 (step S41). The OS layer 103 that hasreceived this request notifies the OS layer 203 of the operating unit 20of the rendering command (having the same contents as those of step S34illustrated in FIG. 5), and the subsequent flow is the same as that ofthe aforementioned first embodiment.

For example, in each of the aforementioned embodiments, the reset switch28 is depressed to trigger a reboot of only the operating unit 20 (thereboot is executed by manual control). However, the invention is notlimited thereto. For example, the operating unit 20 may further includea second detection unit for detecting whether an abnormality occurs inthe operating unit, and the reboot unit 240 may automatically execute areboot of only the operating unit 20 when the second detection unitdetects an abnormality. In such an embodiment, the aforementioned resetswitch 28 is unnecessary.

Program

Programs executed in the MFP 1 of the aforementioned embodiments may bestored and provided, as an installable or executable file, on a computerreadable recording medium such as a CD-ROM, a flexible disk (FD), aCD-R, a digital versatile disk (DVD), or a universal serial bus (USB)device, or may also be distributed and provided through a network suchas the Internet. Furthermore, various types of programs may also beincorporated in advance in a ROM or the like and then provided.

According to the embodiments, it is possible to ensure that a job is notaffected by an error that has occurred.

Although the invention has been described with respect to specificembodiments for a complete and clear disclosure, the appended claims arenot to be thus limited but are to be construed as embodying allmodifications and alternative constructions that may occur to oneskilled in the art that fairly fall within the basic teaching herein setforth.

What is claimed is:
 1. An information processing system comprising: anoperating unit that receives an input in response to a user operation,the operating unit running under a first operating system; and a mainbody that runs under a second operating system and operates in responseto the input received by the operating unit, wherein the main bodyincludes a generation unit that generates a command to direct renderingof a screen corresponding to an application being executed, and acommand transmission control unit that provides control to transmit thecommand to the operating unit, and the operating unit includes areceiving unit that receives the command from the main body, a screenrendering unit that renders the screen in accordance with the commandreceived by the receiving unit, a display unit that displays the screenrendered by the screen rendering unit, and a reboot unit that rebootsonly the operating unit in asynchronization with the main body.
 2. Theinformation processing system according to claim 1, wherein the mainbody includes a first detection unit that detects whether an abnormalityoccurs in a communication with the operating unit, and a rendering breakunit that provides control to break rendering of the screen in theoperating unit when the first detection unit detects the abnormality. 3.The information processing system according to claim 2, wherein therendering break unit directs the generation unit to stop generating thecommand and directs the command transmission control unit to discard thecommand when the first detection unit detects the abnormality.
 4. Theinformation processing system according to claim 2, wherein when theabnormality detected by the first detection unit is eliminated, therendering break unit releases the break of rendering the screen in theoperating unit and the generation unit generates the command to directrendering of a screen depending on a current status of an applicationbeing executed.
 5. The information processing system according to claim2, wherein the main body further includes an interruption processingunit that performs interruption processing that interrupts an operationof an application being executed when the first detection unit detectsthe abnormality.
 6. The information processing system according to claim5, further comprising a storage unit that stores therein pieces offeasibility information indicative of whether the interruptionprocessing is executed, in association with respective types ofapplications, wherein the interruption processing unit executes theinterruption processing when the first detection unit detects theabnormality and the feasibility information for an application beingexecuted indicates that the interruption processing is to be executed,and the interruption processing unit does not execute the interruptionprocessing when the first detection unit detects the abnormality and thefeasibility information for the application indicates that theinterruption processing is not to be executed.
 7. The informationprocessing system according to claim 5, wherein when the abnormalitydetected by the first detection unit is eliminated in a situation wherethe interruption processing is being executed, the rendering break unitreleases the break of rendering the screen in the operating unit and thegeneration unit generates the command to direct rendering of aninterruption screen indicative of a screen that alarms that theoperation of the application is under interruption.
 8. The informationprocessing system according to claim 1, wherein the operating unitfurther includes an operating device used to input a command to executea reboot of only the operating unit, and the reboot unit executes thereboot of the operating unit when an input of the command to execute areboot of the operating unit is received in response to a user operationon the operating device.
 9. The information processing system accordingto claim 1, wherein the operating unit further includes a seconddetection unit that detects whether an abnormality occurs in theoperating unit, and the reboot unit automatically executes a reboot ofonly the operating unit when the second detection unit detects theabnormality.
 10. An information processing method to be executed by anoperating unit that receives an input in response to a user operationand is connected to a main body, the operating unit running under afirst operating system, the main body running under a second operatingsystem and operating in response to the input, the informationprocessing method comprising: receiving from the main body a command todirect rendering of a screen corresponding to an application beingexecuted in the main body; rendering the screen in accordance with thecommand received at the receiving; displaying the screen rendered at therendering; and rebooting only the operating unit in asynchronizationwith the main body.
 11. A non-transitory computer-readable storagemedium with an executable program stored thereon and executed by acomputer of an operating unit that receives an input in response to auser operation and is connected to a main body, the operating unitrunning under a first operating system, the main body running under asecond operating system and operating in response to the input, whereinthe program instructs the computer to perform: receiving from the mainbody a command to direct rendering of a screen corresponding to anapplication being executed in the main body; rendering the screen inaccordance with the command received at the receiving; displaying thescreen rendered at the rendering; and rebooting only the operating unitin asynchronization with the main body.